Thats an...unusual...way to do a liquidation of assets. Usually when a company is wound up the assets get distributed to all the asset holders not just one of them. You cant preference one over the other no matter how many shares you own.
You can if you're clever about how you set the company up and organise things so that you're a secured or preferential creditor. Of course this is not a "company" in any meaningful sense of the word so there's really not much to stop usagi "liquidating" his ventures any way he wishes.
The contract never said anything about preferential shares.
Using BMF assets to pay off a separate company debt is a scam.